I have compared the two of them at length, one of my reps was kind enough to lend me his Razor for a couple of months, I purchased the Swaro 20x60x80HD, I saved the money over time so I was ready to purchase the best, not what was the best value.
I will say that the vortex Razor is a great buy @ 1199.99 here in WI, but I got an even better deal on the swarovaski @ 1999.99 at Cabelas in Owattana MN. It was marked wrong they admitted and told me that it was there mistake so they sold it to me anyway even when I gave them the option not too.
I would have bought the Nikon for 1599.99 or the Leupold HD for 1599.99 before I bought the Vortex for 1599.99, but you can find some great deals on the Vortex's here, if that is the way you are gonna go, PM me and I will give you my contacts here, they will do a Credit Crad transaction over the phone and send it to you. I am not a fan of the dual focal adjustment for hunting, and expecially not vortex's, it is cheaply made.(the focal adjustment, not the rest of it)
To be honest, I was really impressed with the Kowa some of the other guy's mentioned and was gonna buy one but fell into this Swaro. My advice, spend as much as you can, you will be happy with all of them most likely.
booner.